If the end office receives two bursts of analog signals with frequencies of 697 and 1477 Hz, then the number ___ has been punched.

If the end office receives two bursts of analog signals with frequencies of 697 and 1477 Hz, then the number ___ has been punched.

  1. a) 1
  2. b) 2
  3. c) 3
  4. d) 4

From the Combined Bank Senior Officer September 2021 – Preliminary (AUST) exam, question 22 of 92.

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